 Estrid is probably the same person as the Estrid who is mentioned on a number of the Jarlabanke Runestones in Täby and other locations (Broby bro Runestones, Hargs bro runic inscriptions and Uppland Rune Inscriptions 101, 143 and 147).This Estrid was the maternal ancestor of a great clan called the Jarlabanke clan, and she was the maternal grandmother of the powerful Jarlabanke who claimed to own all of Täby.The inscription on U 329, where Ragnfast's sister Estrid is mentioned, has been attributed to the runemaster named Fot who also made the runestones for the Jarlabanke clan.